Measurement of away-side broadening with self-subtraction of flow in Au+Au 
collisions at sqrt{s_NN}=200 GeV

STAR Collaboration,; Adam, J.; Schmitz, N.; Seyboth, P.; et al.,

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Measurement of away-side broadening with self-subtraction of flow in Au+Au collisions at sqrt{s_NN}=200 GeV

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STAR Collaboration,
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Adam, J.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Schmitz, N.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Seyboth, P.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

et al.,
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

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Citation

STAR Collaboration, Adam, J., Schmitz, N., Seyboth, P., & et al. (2020). Measurement of away-side broadening with self-subtraction of flow in Au+Au collisions at sqrt{s_NN}=200 GeV. Chinese Physics C, 44, 104001. Retrieved from https://publications.mppmu.mpg.de/?action=search&mpi=MPP-2020-285.

Cite as: https://hdl.handle.net/21.11116/0000-0008-1AF5-7

Abstract

High transverse momentum (p_T) particle production is suppressed due to parton (jet) energy loss in the hot dense medium created in relativistic heavy-ion collisions. Redistribution of energy at low-to-modest p_T has been elusive to measure because of large anisotropic backgrounds. We report a novel data-driven method for background evaluation and subtraction, exploiting the away-side pseudorapidity gaps, to measure the jetlike correlation shape in Au+Au collisions at sqrt{s_NN}=200 GeV with the STAR experiment. The correlation shapes, for trigger particle p_T>3 GeV/c and various associated particle p_T ranges within 0.5<p_T<10/c, are consistent with Gaussians and their widths are found to increase with centrality. The results indicate jet broadening in the medium created in central heavy-ion collisions.